It makes some page abnoraml, for example, images in https://commons.wikimedia.org/ couldn't zoom.

Io

It has a couple of flaws, but overall it's a great add to the browser.

The thing I enjoy,
When I go to an image it is fit to the page. Basically the one thing I use the app for.

The thing I hate,
When I have the browser set to full screen, my navigation bar won't drop down. I have to either press F11 or close firefox completely, which is very frustrating.

I am a photographer and I have the canon 90D, so I work with very high resolution images, all the time. If not mine, its others. Having the images fit to screen is so very convenient...

I know it is this app because all I have to do is disable the app for the full page option to work perfectly and I have my drop down menu....

It drives me nuts...

Works like a charm. I recomend to set autozoom for every new tab.

useless! doesnt fit images by width as used too years ago what a mess creator did

How to keep the same zoom in "file:///" and all subfolders?

Whenever a page hangs or slow loading it's always this extension that does it.

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Doesn't even work...

This newest update disables the ability to zoom the text only.

This addon is ruthless and destructive and unusable!

Developer should please correct its misbehavior:
I have tested on an old Firefox session which has several hundreds of tabs over several windows. Though after fresh start of session only few tabs are actually loaded. Yet this addon upon activating it started to hog the system's RAM like a glutton.

**Devastating result**: In Process Explorer on overall the System Commit began at 24 GB and with this addon activated it climbed and climbed to 36 GB and went on going for MORE !!

That's where I had to abort this "operation", because system RAM here is 32 GB and all became unresponsive, Firefox's windows went gray.
Luckily deactivation of addon was functioning, so Firefox survived this and OS didn't kill it.

Fellow heavy users beware! This addon will potentially kill your Firefox session !!